On McKinsey's Syntatical Characterizations of Systems of Modal Logic. - F. R. Drake (J. Symb. Log., 1962)

Meeting of the Association for Symbolic Logic Leeds 1967. - M. H. Lob; F. R. Drake; John Derrick (J. Symb. Log., 1968)

European Summer Meeting of the Association for Symbolic Logic: Leeds, 1979. - F. R. Drake; Stanley S. Wainer (J. Symb. Log., 1981)